Revoluble work-feeding chuck.



G. F. CODA. REVOLUBLE WORK FEEDING CHUCK. APPLIOATION nun JULY 31, 1911.

Patented June 25,1912.

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74 z'fnas1s' s' [n Tanta/ C. F. CODA. REVOLUBLE WORK FEEDING CHUCK.

-APPLIOATION FILED JULY 31, 1911.

1,030,283. Patented June 25, 1912.v

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@WWf-WM CHRISTOPHER F. CODA, 013 DETROIT, MICHIGAN.-

REVOLUBLE WORK-FEEDING CHUCK.

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Specification of Letters Patent. Patented Julie 25, 1912.

Application flled July 31, 1911. Serial No. 641,559.

To all whom it may concern: j

Be it known that I, CHRISTOPHER l". CODA, a citizen of the United States of America, residing. at Detroit, in the county of Wayne and State of Michi an, have invented certain new and use 111 Improvements in. Revoluble VVork-Feeding Chucks, of which the following is a specification, ref-' erence being had therein to the accompanying drawings.

The invention relates to revoluble chucks, and has for its object the obtaining of a construction in which the work revolved by the chuck is positively fed forward durin its rotation.

'12 is a further object to obtain a construction in which the chuck is adjustable to v'arious sizes of WOI'k, and is self-centering, and the invention consists in various features of construction as hereinafter set forth.

In the drawings,-Figure 1 is an elevation of the chuck shown in connection with a grinding wheel for polishing the surface of the work; Fig. 2 is a plan view of Fig. 1; Fig. 3 is an end elevation; and Fig. 41s an opposite end view, with the casing re- I moved.

A isa rotary hollow mandrel journaled in a suitable bearing B. C is a head secured to said mandrel, D D are work-feeding grooved rolls mounted upon the head C and radially adjustable toward or from the axis of said mandrel. These rolls are preferably carried by toggle levers E and links F, which latter are pivotally secured to bearings on the head C. The point of pivotal connection between the toggle levers E has secured thereto a slide G, which engages a post H rotatably secured to the head C. This post has also mounted thereon an adjustable abutment member 1, between which and the bearing G a spring J is interposed and preferably sleeved about the post. The

abutment member I preferably has a threaded engagement withthe post H, so that by rotating said post the position of the abutment may be changed, which will vary the 'an 1e of the toggle levers.

ith the construction as thus far described, it will be understood that the distance that the rolls D D are from the axis of the hollow mandrel depends upon the angular adjustment of the links of the toggle lever, which in turn depend upon the adjustment of the abutment member 1. Thus,

by rotating the post H to draw the abutment member Ilinward or toward the head, the toggle levers E will be spread, moving the rolls D D away from the axis of the mandrel. The reverse adjustment will draw the rolls nearer to the axis of the mandrel, and. the range is preferably such as to permit any adjustment between actual contact of the rolls with each other and the outer limit desired. The rolls are, however, free to move outward independently of any adjustment of the abutment member I by compressing the springs J ,and thus a yielding pressure is exerted by the rolls upon the work.

To positively drive the rolls, a gear train is arranged, which as shown comprises the gear wheels K upon: each of the roll spin- L are gear wheels concentric with the pivots of the links F which .intermesh with each other and respectively with the gear wheels K.

M is a gear wheel intermeshing with one of the gear wheels L and secured to a rotatable shaft N arranged in rear of the head C and having thereon the worm wheel 0 which is in engagement with a stationary worm wheel P on the bearing B. Thus, when the hollow mandrel is rotated by suitable means, such as the sprocket Q thereon, the engagement between the worm wheel 0' and stationary worm wheel P will cause the slow rotation of the former, which will be transmitted through thegear train to the rolls D D. These rolls will thus be positively driven, and at the same time they are free to be adjusted toward or. from the axis of the hollow mandrel, either by ad justmachine, as for instance in polishing pipe,

a grinder or other polishing cutter, such as S, is used, and which is controlled in engage ment withthe work by a trip lever T. This trip lever is pivotally secured to a statlonary frame U and is arranged toproject into the path of the work when fed to the hollow mandrel, so that the impinging of the Work against said member will cause the partial rotation thereof.

V is a cam connected 'to the member T, which operatesupon a rockable lever W, which in turn engages an adjustable post X connected to the frame of the. grinder S. The arrangement is such that the operation of the member '1 by the advancing Work will cause the cam V to rock the lever W, thereby lifting the post X and moving the grinder S out of the path of the'work until the latter has entered therebeneath. The further movement of the member Twill disengage .thecam V from the lever W, permitting the post X to drop and the grinder wheel to come in cont-act with the work.

which is simultaneously rotated and fed forward until disengaged from the chuck.

What I claim as my invention is,-

1. The combination with a revoluble hollow mandrel, of a pair of feed rolls mounted thereon and movable toward and from the axis of said mandreL-a pair of toggle levers connecting said rolls, a guide parallel with the axis of said mandrel, and a slidable connection between the pivot of said toggle levers and said guide. v

2. The combination with a revoluble hollow mandrel, of a pair of feed rolls mounted thereon and movable toward and from the axis, toggle links connecting said rolls, a guide parallel with the axis of said mandrel, a slide engaging said guide connected. with the pivotal point of said links, and a spring for resiliently yieldably resisting the movement of said slide upon said guide.

3 3. The combination with a revoluble hollow mandrel, of a pair of feed rolls mounted thereon and movable toward or from the axis of the mandrel, a pair of toggle links connecting said feed rolls,a guide parallel with the axis of said mandrel, a slide engaging said guide and connected to the pivotal point of said toggle links, and an adjustable stop for limiting the movement of said slide upon said guide.

4. The combination with a revoluble hollow mandrel, of a pair of feed rolls mounted thereon and adjustable toward or from the axis thereof, a pair of toggle links connect-v ing said feed rolls, a guide parallel to the axis of the mandrel, a slide engaging said guide and connected with the pivotal pointof said toggle links, a stop for said slide adjustable on said guide, and a spring for yieldably pressing said slide against said sto 7 5 The combination with a revoluble hollow mandrel, ofa pair of feed rolls mounted thereon, a pair of toggle links connecting said rolls, a guide parallel with theaxis of said mandrel, a slide upon said guide engaging the pivotal connection of said toggle links, and a member adjustable on said guide provided with a stop for said slide, and an opposed abutment, and a spring engaging said abutment and yieldably pressing said slide against said stop.

6. The combinationwith a revoluble hollow mandrel, of a pair of feed rolls mounted thereon and adjustable toward and from the axis thereof, a pair of toggle links connecting said rolls, a revoluble post forming a guide parallel with the axis of said mandrel,

,a slide upon said guide, a member having a.

threaded engagement with said revoluble post provided with a stop for said slide, and an opposed abutment, and a spring interposed between said abutment and said slide.

and an adjustable stop for said slide upon said guide.

.8. The combination with a revoluble hollow'mandrel, of feed rolls mounted thereon, a drive train for said feed rolls, and means for yieldably pressing said feed rolls toward the axis of said mandrel, a grinding .wheel adjacent to said mandrel adjustable toward the axis thereof, a trip arranged in the path ofthe work engaging said feed rolls, and connections between said trip and grinding wheel for withdrawing the latter to permit the entrance of the work therebeneat-h.

9'. The combination with a revoluble hollow mandrel, of a plurality of feed rolls mounted thereon and movable toward and from the axis of said mandrel, toggle links connecting said rolls, and a member connected to the pivotal point of said toggle links and adjust-able parallel with the axis of said mandrel.

10. The combination with a revoluble hollow mandrel, of a plurality of feed rolls mounted thereon and movable toward and from the axis of said mandrel, toggle links nosonse connecting said rolls, and a member adjustable parallel with the axis ofsaid mandrel and having a yieldable connection with the pivotal point of said toggle links.

' 11. The combination with a revoluble hollow mandrel, of a bearing in which said mandrel is journaled, a stationary .worm wheel mounted on said bearing, a cooperating worm wheel mounted on said revoluble mandrel, a pair of feed rolls mounted upon 10 said mandrel, and a gear train between said feed rolls and said worm wheel.

. In testimony whereof I afi'ix my signature in presence of two witnesses.

CHRISTOPHER F. CODA. Witnesses:

JAMEs P. BARRY, C. B. BELKNAJP. 

